Lithium-containing ceramics were quickly recognized as promising triti
um breeding materials for fusion reactor blankets, particularly becaus
e of their safety advantages. Relevant material properties were invest
igated to evaluate further their suitability. An extensive R&D program
complemented a conceptual blanket design activity either for near-ter
m machines or for power reactors. All aspects were addressed: fabricab
ility; overall properties (baseline, thermal, mechanical); compatibili
ty with structures and beryllium; tritium release characteristics; irr
adiation behavior; activation; reprocessing; waste disposal issues. As
a result of this investigation, lithium-containing ceramics are consi
dered to be excellent tritium breeding materials.